Nine comment flags were raised on that question last night. I went through the comments this morning and deleted a bunch of them which were straying into extended only-tangentially-relevant discussion (various IRL examples, continuing on from Barmar's comment). I declined a couple of the comment flags, including the one on Barmar's comment since it gives some useful/interesting information, although the follow-up comments got too many to keep them all.
Your comment was one of those flagged, and I almost declined that flag too - certainly I wouldn't have deleted that 24-upvoted comment if I'd just happened across it while browsing. But since it was flagged, and didn't add anything useful except a bit of humour (and I didn't find it funny), I went ahead and deleted it.
But it's not doing much harm, I was on the fence about it, and usually I do leave much-upvoted joke comments alone rather than deleting them. Since it was considered worth a whole meta post, I've now undeleted it.
For the general principle on joke comments, see What should we do about "funny" comments? Personally I often use the number of comment upvotes as an indicator of humour value in lieu of "usefulness". If there's several jokes cluttering up a comments section and none of them got upvoted much, I might clear them up, especially if they're flagged. If there's one joke comment with a lot of upvotes, I'll usually assume the community likes it and leave it alone.